The use of ground glass in red glazes: structural 3D imaging and mechanical behaviour using optical coherence tomography and nanoindentation

Heritage Science

Table 1 Mean thickness and properties of the glass particles (total number and volume, median size) for the four samples, measured by our OCT protocol

#	Glass content	Mean, std thickness layer	Total particle number	Total glass volume	Volume% glass	Median particle size
B1	No glass	0.22 ± 0.01 mm	–	–	–	–
B2	Coarse glass	0.37 ± 0.03 mm	206	0.1 mm³	3.2%	3.5 × 10^-5 mm³
B3	Fine glass	0.40 ± 0.02 mm	313	0.3 mm³	4.7%	2.5 × 10^-5 mm³
B4	Fine glass added to paint and ground together for 25 min	0.36 ± 0.04 mm	632	0.1 mm³	2.4%	2.3 × 10^-5 mm³